BMW R 50 S

BMW R 50 S Date 1960 - 1962

Number sold 1.634

Price 3.535,- DM

Engine

Internal Designation 252 / 3
Engine type four-stroke two-cylinder flat-twin
Bore/stroke 68 x 68 mm
Cubic capacity 494 cm3
Max power 35 PS at 7650 rpm
Compression ratio 9,5 : 1
Valves per cylinder ohv
Carburation system 2 carburettor Bing 1/26/71 - 1/26/72
Engine lubrication forced-feed lubrication
Oil pump gear pump

Power transmission

Clutch single disc saucer spring, dry
Number of gears 4
Shifting foot Shifting
Gear ratios 4,17 / 2,73 / 1,94 / 1,54
Rear wheel ratio 1 : 3,58 (with sidecar 1 : 4,33)
Bevel/crown wheel 7 / 25 (with sidecar 6 / 26)

Electrical system

Alternator Bosch LJ/CGE 60/6/1700 R
Ignition magneto ignition
Spark plugs Bosch W 260 T 1 or Beru 260 / 14

Suspension

Designation 245/2
Type of frame twin-loop steel tubular frame
Front suspension long swinging arm with strut und oil-pressure shock absorbers
Rear suspension long swinging arm with strut und oil-pressure shock absorbers
wheel rims deep-bed 2,15B x 18, at sidecar, rear 2,75C x 18
Tyres front 3,50 x 18 S
Tyres rear 4,00 x 18 S
Brakes front drum brake, 200 mm Duplex full hub
Brakes rear drum brake, 200 mm Simplex full hub

Dimensions and weights

Length x width x height 2125 x 660 x 980 mm
Wheel base 1415 mm (with sidecar 1450 mm)
Tank capacity 17 l
Unladen weight, full tank 198 kg (with orig. BMW sidecar 320 kg)
permitted gross vehicle weight 360 kg (with orig. BMW sidecar 600 kg)
idle/riding noise 84 / 82 DIN-phon
Fuel consumption ca. 5,2 l / 100 km
Oil consumption ca. 0,5 - 1 l / 1000 km
Top speed 160 km/h

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